-//
-// System.Attribute.cs
-//
-// Author:
-// Miguel de Icaza (miguel@ximian.com)
-//
-// (C) Ximian, Inc. http://www.ximian.com
-//
-
-namespace System {
-
- public abstract class Attribute {
-
- protected Attribute ()
- {
- }
-
- public virtual object TypeId {
- get {
- // TODO: Implement me
- return null;
- }
- }
- }
-}
+//\r
+// System.Attribute.cs\r
+//\r
+// Authors:\r
+// Miguel de Icaza (miguel@ximian.com) - Original\r
+// Nick D. Drochak II (ndrochak@gol.com) - Implemented most of the guts\r
+//\r
+// (C) Ximian, Inc. http://www.ximian.com\r
+//\r
+\r
+using System;\r
+using System.Globalization;\r
+\r
+namespace System {\r
+\r
+ [AttributeUsage(AttributeTargets.All)]\r
+ [Serializable]\r
+ public abstract class Attribute {\r
+\r
+ protected Attribute ()\r
+ {\r
+ }\r
+\r
+ public virtual object TypeId {\r
+ get {\r
+ // Derived classes should override this default behaviour as appropriate\r
+ return this.GetType ();\r
+ }\r
+ }\r
+\r
+ private static void CheckParameters (object element, Type attribute_type)\r
+ {\r
+ // neither parameter is allowed to be null\r
+ if (null == element) \r
+ {\r
+ throw new ArgumentNullException ("element");\r
+ }\r
+\r
+ if (null == attribute_type) \r
+ {\r
+ throw new ArgumentNullException ("attribute_type");\r
+ }\r
+ }\r
+\r
+ private static System.Attribute FindAttribute (object[] attributes)\r
+ {\r
+ // if there exists more than one attribute of the given type, throw an exception\r
+ if (attributes.Length > 1) {\r
+ throw new System.Reflection.AmbiguousMatchException (\r
+ Locale.GetText ("<element> has more than one attribute of type <attribute_type>"));\r
+ }\r
+\r
+ if (attributes.Length < 1) \r
+ return null;\r
+\r
+ // tested above for '> 1' and and '< 1', so only '== 1' is left,\r
+ // i.e. we found the attribute\r
+ \r
+ return (System.Attribute) attributes[0];\r
+ }\r
+\r
+ private static void CheckAncestry (Type attribute_type)\r
+ {\r
+ // attribute_type must be derived from type System.Attribute\r
+ Type t = typeof (System.Attribute);\r
+ \r
+ /* fixme: thgi does not work for target monolib2\r
+ if (!attribute_type.IsSubclassOf (t))\r
+ {\r
+ throw new ArgumentException ("Parameter is not a type derived from System.Attribute", "attribute_type");\r
+ }\r
+ */\r
+ }\r
+\r
+ public static Attribute GetCustomAttribute (System.Reflection.ParameterInfo element,\r
+ Type attribute_type)\r
+ {\r
+ return GetCustomAttribute (element, attribute_type, true);\r
+ }\r
+\r
+ public static Attribute GetCustomAttribute (System.Reflection.MemberInfo element,\r
+ Type attribute_type)\r
+ {\r
+ return GetCustomAttribute (element, attribute_type, true);\r
+ }\r
+\r
+ public static Attribute GetCustomAttribute (System.Reflection.Assembly element,\r
+ Type attribute_type)\r
+ {\r
+ return GetCustomAttribute (element, attribute_type, true);\r
+ }\r
+\r
+ public static Attribute GetCustomAttribute (System.Reflection.Module element,\r
+ Type attribute_type)\r
+ {\r
+ return GetCustomAttribute (element, attribute_type, true);\r
+ }\r
+\r
+ public static Attribute GetCustomAttribute (System.Reflection.Module element,\r
+ Type attribute_type, bool inherit)\r
+ {\r
+ // neither parameter is allowed to be null\r
+ CheckParameters (element, attribute_type);\r
+\r
+ // attribute_type must be derived from type System.Attribute\r
+ CheckAncestry (attribute_type);\r
+\r
+ // Module inheritance hierarchies CAN NOT be searched for attributes, so the second\r
+ // parameter of GetCustomAttributes () is INGNORED.\r
+ object[] attributes = element.GetCustomAttributes (attribute_type, inherit);\r
+\r
+ return FindAttribute (attributes);\r
+ }\r
+\r
+ public static Attribute GetCustomAttribute (System.Reflection.Assembly element,\r
+ Type attribute_type, bool inherit)\r
+ {\r
+ // neither parameter is allowed to be null\r
+ CheckParameters (element, attribute_type);\r
+\r
+ // attribute_type must be derived from type System.Attribute\r
+ CheckAncestry (attribute_type);\r
+\r
+ // Assembly inheritance hierarchies CAN NOT be searched for attributes, so the second\r
+ // parameter of GetCustomAttributes () is INGNORED.\r
+ object[] attributes = element.GetCustomAttributes (attribute_type, inherit);\r
+\r
+ return FindAttribute (attributes);\r
+ }\r
+\r
+ public static Attribute GetCustomAttribute (System.Reflection.ParameterInfo element,\r
+ Type attribute_type, bool inherit)\r
+ {\r
+ // neither parameter is allowed to be null\r
+ CheckParameters (element, attribute_type);\r
+\r
+ // attribute_type must be derived from type System.Attribute\r
+ CheckAncestry (attribute_type);\r
+\r
+ // ParameterInfo inheritance hierarchies CAN NOT be searched for attributes, so the second\r
+ // parameter of GetCustomAttributes () is INGNORED.\r
+ object[] attributes = element.GetCustomAttributes (attribute_type, inherit);\r
+\r
+ return FindAttribute (attributes);\r
+ }\r
+\r
+ public static Attribute GetCustomAttribute (System.Reflection.MemberInfo element,\r
+ Type attribute_type, bool inherit)\r
+ {\r
+ // neither parameter is allowed to be null\r
+ CheckParameters (element, attribute_type);\r
+\r
+ // attribute_type must be derived from type System.Attribute\r
+ CheckAncestry (attribute_type);\r
+\r
+ // MemberInfo inheritance hierarchies can be searched for attributes, so the second\r
+ // parameter of GetCustomAttributes () is respected.\r
+ object[] attributes = element.GetCustomAttributes (attribute_type, inherit);\r
+\r
+ return FindAttribute (attributes);\r
+ }\r
+\r
+ public static Attribute[] GetCustomAttributes (System.Reflection.Assembly element)\r
+ {\r
+ return System.Attribute.GetCustomAttributes (element, true);\r
+ }\r
+\r
+ public static Attribute[] GetCustomAttributes (System.Reflection.ParameterInfo element)\r
+ {\r
+ return System.Attribute.GetCustomAttributes (element, true);\r
+ }\r
+\r
+ public static Attribute[] GetCustomAttributes (System.Reflection.MemberInfo element){\r
+ return System.Attribute.GetCustomAttributes (element, true);\r
+ }\r
+\r
+ public static Attribute[] GetCustomAttributes (System.Reflection.Module element){\r
+ return System.Attribute.GetCustomAttributes (element, true);\r
+ }\r
+\r
+ public static Attribute[] GetCustomAttributes (System.Reflection.Assembly element,\r
+ Type attribute_type)\r
+ {\r
+ return System.Attribute.GetCustomAttributes (element, attribute_type, true);\r
+ }\r
+\r
+ public static Attribute[] GetCustomAttributes (System.Reflection.Module element,\r
+ Type attribute_type)\r
+ {\r
+ return System.Attribute.GetCustomAttributes (element, attribute_type, true);\r
+ }\r
+\r
+ public static Attribute[] GetCustomAttributes (System.Reflection.ParameterInfo element,\r
+ Type attribute_type)\r
+ {\r
+ return System.Attribute.GetCustomAttributes (element, attribute_type, true);\r
+ }\r
+\r
+ public static Attribute[] GetCustomAttributes (System.Reflection.MemberInfo element,\r
+ Type attribute_type)\r
+ {\r
+ return System.Attribute.GetCustomAttributes (element, attribute_type, true);\r
+ }\r
+\r
+ public static Attribute[] GetCustomAttributes (System.Reflection.Assembly element,\r
+ Type attribute_type, bool inherit)\r
+ {\r
+ // element parameter is not allowed to be null\r
+ CheckParameters (element, attribute_type);\r
+\r
+ // make a properly typed array to return containing the custom attributes\r
+ System.Attribute[] attributes;\r
+\r
+ attributes = (System.Attribute[]) element.GetCustomAttributes (\r
+ attribute_type, inherit);\r
+\r
+ return attributes;\r
+ }\r
+\r
+ public static Attribute[] GetCustomAttributes (System.Reflection.ParameterInfo element,\r
+ Type attribute_type, bool inherit)\r
+ {\r
+ // element parameter is not allowed to be null\r
+ CheckParameters (element, attribute_type);\r
+\r
+ // make a properly typed array to return containing the custom attributes\r
+ System.Attribute[] attributes = (System.Attribute[]) element.GetCustomAttributes (\r
+ attribute_type, inherit);\r
+\r
+ return attributes;\r
+ }\r
+\r
+ public static Attribute[] GetCustomAttributes (System.Reflection.Module element,\r
+ Type attribute_type, bool inherit)\r
+ {\r
+ // element parameter is not allowed to be null\r
+ CheckParameters (element, attribute_type);\r
+\r
+ // make a properly typed array to return containing the custom attributes\r
+ System.Attribute[] attributes = (System.Attribute[]) element.GetCustomAttributes (\r
+ attribute_type, inherit);\r
+\r
+ return attributes;\r
+ }\r
+\r
+ public static Attribute[] GetCustomAttributes (System.Reflection.MemberInfo element,\r
+ Type attribute_type, bool inherit)\r
+ {\r
+ // element parameter is not allowed to be null\r
+ CheckParameters (element, attribute_type);\r
+\r
+ // make a properly typed array to return containing the custom attributes\r
+ System.Attribute[] attributes = (System.Attribute[]) element.GetCustomAttributes (\r
+ attribute_type, inherit);\r
+\r
+ return attributes;\r
+ }\r
+\r
+ public static Attribute[] GetCustomAttributes (System.Reflection.Module element,\r
+ bool inherit)\r
+ {\r
+ // element parameter is not allowed to be null\r
+ CheckParameters (element, typeof (System.Attribute));\r
+\r
+ // make a properly typed array to return containing the custom attributes\r
+ System.Attribute[] attributes = (System.Attribute[]) element.GetCustomAttributes (\r
+ inherit);\r
+\r
+ return attributes;\r
+ }\r
+ \r
+ public static Attribute[] GetCustomAttributes (System.Reflection.Assembly element,\r
+ bool inherit)\r
+ {\r
+ // element parameter is not allowed to be null\r
+ CheckParameters (element, typeof (System.Attribute));\r
+\r
+ // make a properly typed array to return containing the custom attributes\r
+ System.Attribute[] attributes = (System.Attribute[]) element.GetCustomAttributes (\r
+ inherit);\r
+\r
+ return attributes;\r
+ }\r
+\r
+ public static Attribute[] GetCustomAttributes (System.Reflection.MemberInfo element,\r
+ bool inherit)\r
+ {\r
+ // element parameter is not allowed to be null\r
+ CheckParameters (element, typeof (System.Attribute));\r
+\r
+ // make a properly typed array to return containing the custom attributes\r
+ System.Attribute[] attributes = (System.Attribute[]) element.GetCustomAttributes (\r
+ inherit);\r
+\r
+ return attributes;\r
+ }\r
+\r
+ public static Attribute[] GetCustomAttributes (System.Reflection.ParameterInfo element,\r
+ bool inherit)\r
+ {\r
+ // element parameter is not allowed to be null\r
+ CheckParameters (element, typeof (System.Attribute));\r
+\r
+ // make a properly typed array to return containing the custom attributes\r
+ System.Attribute[] attributes = (System.Attribute[]) element.GetCustomAttributes (\r
+ inherit);\r
+\r
+ return attributes;\r
+ }\r
+\r
+ public override int GetHashCode ()\r
+ {\r
+ return ((Object) this).GetHashCode ();\r
+ }\r
+ \r
+ public virtual bool IsDefaultAttribute ()\r
+ {\r
+ // Derived classes should override this default behaviour as appropriate\r
+ return false;\r
+ }\r
+ \r
+ public static bool IsDefined (System.Reflection.Module element, Type attribute_type)\r
+ {\r
+ return (System.Attribute.GetCustomAttributes (element, attribute_type).Length > 0);\r
+ }\r
+\r
+ public static bool IsDefined (System.Reflection.ParameterInfo element, Type attribute_type)\r
+ {\r
+ return (System.Attribute.GetCustomAttributes (element, attribute_type).Length > 0);\r
+ }\r
+\r
+ public static bool IsDefined (System.Reflection.MemberInfo element, Type attribute_type)\r
+ {\r
+ return (System.Attribute.GetCustomAttributes (element, attribute_type).Length > 0);\r
+ }\r
+\r
+ public static bool IsDefined (System.Reflection.Assembly element, Type attribute_type)\r
+ {\r
+ return (System.Attribute.GetCustomAttributes (element, attribute_type).Length > 0);\r
+ }\r
+\r
+ public static bool IsDefined (System.Reflection.MemberInfo element, Type attribute_type,\r
+ bool inherit)\r
+ {\r
+ return (System.Attribute.GetCustomAttributes (\r
+ element, attribute_type, inherit).Length > 0);\r
+ }\r
+\r
+ public static bool IsDefined (System.Reflection.Assembly element, Type attribute_type,\r
+ bool inherit)\r
+ {\r
+ return (System.Attribute.GetCustomAttributes (\r
+ element, attribute_type, inherit).Length > 0);\r
+ }\r
+\r
+ public static bool IsDefined (System.Reflection.Module element, Type attribute_type,\r
+ bool inherit)\r
+ {\r
+ return (System.Attribute.GetCustomAttributes (\r
+ element, attribute_type, inherit).Length > 0);\r
+ }\r
+\r
+ public static bool IsDefined (System.Reflection.ParameterInfo element,\r
+ Type attribute_type, bool inherit)\r
+ {\r
+ return (System.Attribute.GetCustomAttributes (\r
+ element, attribute_type, inherit).Length > 0);\r
+ }\r
+ \r
+ public virtual bool Match (object obj)\r
+ {\r
+ // default action is the same as Equals.\r
+ // Derived classes should override as appropriate\r
+ \r
+ return this.Equals (obj);\r
+ }\r
+\r
+ public override bool Equals (object obj)\r
+ {\r
+ if (obj == null || !(obj is Attribute))\r
+ return false;\r
+\r
+ return ((Attribute) obj) == this;\r
+ }\r
+ }\r
+}\r
projects / mono.git / blobdiff